Algebra
Colloquium

Voluma 6 • Number 1 ' March 1999

On Centralizer-like Subgroups Associated with the
n-Engel Word 1
L.-C. Kappe and P.M. Ratchford

Biordered Set Languages in Band Languages 9
P.R. Kumar

On the Finitary Linearity of Wreath Products of Groups 23
B.A.F. Wehrfritz

Strongly Semiprime Near-rings 33
N.J. Groenewald

On Exchange Rings with All Idempotents Central 45
H.Y. Chen

q-Witt Algebras, q-Lie Algebras, q-Holomorph Structure and
Representations 51
N.H. Hu

Lattices of Subautomata and Direct Sum Decompositions of
Automata 71
M. 6iri c and S. Bogdanovi c 71


Invariant Additive Subgroups of Simple Rings 89
C.L„Chuang

Full Ideas of Polynomial Functions on Z„n 97
C.J. Maxson and A.B. van der Merwe

On Quasi-C-semigroups and Some Special Subclasses 105
Y.Q. GIIO, K.P. Shum and P.Y. Zhu